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authorEzequiel Garcia <ezequiel.garcia@free-electrons.com>2014-03-15 15:17:57 -0300
committerWim Van Sebroeck <wim@iguana.be>2014-06-10 21:44:06 +0200
commit92d4fc1a1f56a12fa09c92d8c89873509a8012c9 (patch)
tree3759aeeae801787401f0c7d0db04533574cf4411 /drivers/watchdog
parentaaaac9ec79b7c4e21741df35d2247a1187836129 (diff)
watchdog: orion: Introduce a SoC-specific RSTOUT mapping
Separate the RSTOUT register mapping for the different compatible strings supported by the driver. This allows to use devm_ioremap on SoC variants that share the RSTOUT register, and devm_ioremap_resource (which requests the MMIO region) on SoCs that have a dedicated RSTOUT register. Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Jason Cooper <jason@lakedaemon.net> Tested-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/orion_wdt.c27
1 files changed, 20 insertions, 7 deletions
diff --git a/drivers/watchdog/orion_wdt.c b/drivers/watchdog/orion_wdt.c
index afa38314fb18..75f623f5e6c3 100644
--- a/drivers/watchdog/orion_wdt.c
+++ b/drivers/watchdog/orion_wdt.c
@@ -262,10 +262,6 @@ static void __iomem *orion_wdt_ioremap_rstout(struct platform_device *pdev,
return devm_ioremap(&pdev->dev, res->start,
resource_size(res));
- /* This workaround works only for "orion-wdt", DT-enabled */
- if (!of_device_is_compatible(pdev->dev.of_node, "marvell,orion-wdt"))
- return NULL;
-
rstout = internal_regs + ORION_RSTOUT_MASK_OFFSET;
WARN(1, FW_BUG "falling back to harcoded RSTOUT reg %pa\n", &rstout);
@@ -316,6 +312,7 @@ MODULE_DEVICE_TABLE(of, orion_wdt_of_match_table);
static int orion_wdt_get_regs(struct platform_device *pdev,
struct orion_watchdog *dev)
{
+ struct device_node *node = pdev->dev.of_node;
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -326,10 +323,26 @@ static int orion_wdt_get_regs(struct platform_device *pdev,
if (!dev->reg)
return -ENOMEM;
- dev->rstout = orion_wdt_ioremap_rstout(pdev, res->start &
- INTERNAL_REGS_MASK);
- if (!dev->rstout)
+ /* Each supported compatible has some RSTOUT register quirk */
+ if (of_device_is_compatible(node, "marvell,orion-wdt")) {
+
+ dev->rstout = orion_wdt_ioremap_rstout(pdev, res->start &
+ INTERNAL_REGS_MASK);
+ if (!dev->rstout)
+ return -ENODEV;
+
+ } else if (of_device_is_compatible(node, "marvell,armada-370-wdt") ||
+ of_device_is_compatible(node, "marvell,armada-xp-wdt")) {
+
+ /* Dedicated RSTOUT register, can be requested. */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ dev->rstout = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(dev->rstout))
+ return PTR_ERR(dev->rstout);
+
+ } else {
return -ENODEV;
+ }
return 0;
}